EP0648168A1 - Dispositif electronique anti-vol pour vehicules a moteur - Google Patents

Dispositif electronique anti-vol pour vehicules a moteur

Info

Publication number
EP0648168A1
EP0648168A1 EP94916218A EP94916218A EP0648168A1 EP 0648168 A1 EP0648168 A1 EP 0648168A1 EP 94916218 A EP94916218 A EP 94916218A EP 94916218 A EP94916218 A EP 94916218A EP 0648168 A1 EP0648168 A1 EP 0648168A1
Authority
EP
European Patent Office
Prior art keywords
chip carrier
board computer
output data
reading
motor vehicle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP94916218A
Other languages
German (de)
English (en)
Inventor
Michael Kohne
Thomas P. Daue
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE19934315290 external-priority patent/DE4315290C2/de
Priority claimed from DE19934333586 external-priority patent/DE4333586A1/de
Application filed by Individual filed Critical Individual
Publication of EP0648168A1 publication Critical patent/EP0648168A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R25/00—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles
    • B60R25/20—Means to switch the anti-theft system on or off
    • B60R25/25—Means to switch the anti-theft system on or off using biometry
    • B60R25/252—Fingerprint recognition
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R25/00—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles

Definitions

  • the invention relates to a device for protection against unauthorized use of a motor vehicle, which has a drive system controlled by an on-board computer.
  • EP-A-0 456 916 describes an electronic theft protection for motor vehicles in which the central processor unit of a motor vehicle can be activated with the aid of a chip card.
  • the chip card has a memory which contains part of the work program of the central processor unit, which has to be transferred from the chip card into the memory of the central processor unit each time for starting the motor vehicle.
  • the chip card is inserted into a write-reading device, a personal identification number is entered on an input keyboard, and after checking the entered the codes from the chip card, if necessary, to the central processor unit in encrypted form.
  • the chip card is removed, the transmitted program component in the memory of the central processor unit is deleted and the vehicle cannot be used.
  • the program part which is stored on the chip card is transmitted in encrypted form to the reading and writing device, a certain starting sequence of the signal on the chip card and the reading and writing device having to match, otherwise decoding of the signal in the writing / reading device is not possible .
  • the data connections between the read / write device and the central processor unit also take place in encrypted form.
  • the invention has for its object to provide an improved electronic anti-theft device for a motor vehicle, which ensures increased security against unauthorized use of the motor vehicle.
  • the invention is based on the following basic ideas.
  • a chip card which contains a microprocessor and a memory device, for example a ROM, as the active element.
  • a chip card reader and writer in the passenger compartment, which is connected to the on-board computer via a data connection, for example a data bus, and into which the chip card is inserted before the vehicle is started.
  • the chip card is placed over the chip card reader and writer supplied with coded information for the operation of the motor vehicle.
  • the microprocessor of the chip card decodes and processes this information and delivers necessary operating data, for example mixture composition, ignition sequence, etc., to the central processor unit of the on-board computer, generally an injection computer, via the chip card reader and writer, so that the motor vehicle can start .
  • the invention has the advantage that the operating data necessary for the operation of the motor vehicle are generated from first and second output data only on the basis of a computing operation using a processing program.
  • the first output data are stored in the memory devices on the chip card and the second output data in the memory devices in the security device. Only when the first data connection is established, i.e. when the chip carrier is inserted into the reading and writing device, the second output data are transmitted to the chip card and linked in the chip card with the first output data, and the operating data thus obtained are forwarded to the safety device and from there to the on-board computer.
  • the data transmission preferably takes place in encrypted form via the various data connections.
  • the first and second output data are changed after each generation of operating data.
  • the output data are preferably stored in coded form in a table in the first storage devices on the chip card.
  • the second output data have a code which is preferably also used for coding the first output data.
  • the code can be changed.
  • the code is preferably changed in the manner described above after each generation of operating data.
  • a counter is provided in the safety device, which preferably runs continuously, even after switching off the ignition, the counter reading of which is used as address at a certain point in time, with that stored in the second memory device A table at this address is called up. For example, since the counter runs at a rate of 100 steps per second, it is not possible for a user to produce a particular result.
  • the security device is arranged on the cable that connects the on-board computer to the peripheral devices.
  • the safety device is preferably integrated in the multiple plug at the end of this cable or combined with it to form a structural unit.
  • the safety device can be cast with the plug in a housing.
  • Aus ⁇ 's leadership form the safety device in the It is possible to change signals on the signal lines in such a way that the on-board computer is simulated to be in an operating state that is actually not present, by modifying or completely blocking the signals coming from the detector devices and generating other signals.
  • This embodiment of the invention does not require an intervention in the on-board computer, in particular the programs used therein.
  • a fingerprint reader and an associated evaluation device are provided, with which the authorization of a person to drive the motor vehicle can be checked and the security device is only triggered when an authorized person is identified, the operation to release the motor vehicle.
  • the chip card reader and writer is integrated in the ignition lock and / or the active element of the chip card is integrated in the ignition key. This has the advantage that the same functionality offers greater ease of use and greater security.
  • the advantage of the invention is that an unauthorized person cannot start the motor vehicle simply by overcoming a lock, since for the starting process a data exchange and processing of information in operating data for the motor vehicle drive, preferably for an injection device for the fuel , required are.
  • the chip card receives the information in coded form, for example an individual code for the respective vehicle, and decodes it before processing. After successful start-up, the chip card is no longer required until the next engine start and can be removed from the chip card reader and writer again. Both the chip card and the chip card reader and writer can be produced in a very small version.
  • the smart card reader and -Record can be retrofitted into the motor vehicle and can be attached, for example, in the glove compartment or on the center console.
  • the chip card reader and writer is preferably installed in the ignition lock present in a motor vehicle. In this case, the active element of the chip card is integrated in the ignition key.
  • the ignition key forms the carrier for the chip, which is arranged, for example, on the key handle and can be connected to corresponding contact pins in the ignition lock via corresponding contact surfaces, preferably in the beard area. This creates a simple connection between the chip and the chip card reader and writer.
  • a time interval (e.g. 10 to 30 minutes) that can be set by the vehicle driver is stored on the chip card, and a concealed switch is attached to the vehicle and is connected to the on-board computer. If the driver is forced to leave the vehicle in the event of a robbery while the engine is running and the chip card is inserted, he can actuate the switch to have the chip card reader and writer read out the set time period and send it to the on-board computer, which then runs out of the Zeitab ⁇ section turns off the engine, the chip card can not start the engine again.
  • a time interval e.g. 10 to 30 minutes
  • This embodiment has the advantage that the motor vehicle is stopped safely for the driver only after he has moved away from him.
  • the chip card contains information which, after the chip card has been inserted into the chip card reader and writer, releases a lock for the engine and trunk hood.
  • an electronic device can also be installed that controls the locking. Parallel to the parking len of the motor after operating the hidden switch, the lock is actuated.
  • a small emergency voltage battery can be arranged in the vehicle, which actuates the lock when the vehicle battery is empty.
  • Fig. 1 is a block diagram of a first embodiment of the
  • FIG. 2 is a block diagram of a second embodiment of the invention.
  • the embodiment of the invention shown in FIG. 1 comprises a chip card 10 with a first microprocessor 12, a first program memory 14 and a first data memory 16.
  • the chip card 10 is connected to a reading and writing device 20 via a first data connection 18.
  • the reading and writing device is connected to a security device 30 via a second data connection 28, a bidirectional data connection, preferably for serial data transmission.
  • the safety device 30 comprises a second microprocessor 32, a second program memory 34 and a second data memory 36.
  • the safety device is connected to an on-board computer 40 of a motor vehicle via a third data connection 38.
  • First output data are stored in the first data memory 16 and second output data are stored in the second data memory 38.
  • a first processing program is also stored in the first program memory.
  • the security device 30 receives a signal, whereby the second microprocessor 32 delivers the second output data stored in the second data memory 36 to the first microprocessor.
  • Processing takes place in the first microprocessor 12 on the chip card 10 by means of the processing program in FIG the first data memory 16 existing first output data and the transmitted second output data.
  • the operating data necessary for the operation of the motor vehicle are generated and supplied from the chip card to the safety device 30 via the reading and writing device 20.
  • the operating data are sent from the safety device 30 to the on-board computer 40, which can only start the electronics for the engine management, for example, after receiving this operating data.
  • the security device sends a code that corresponds to a product of two prime numbers to the processor of the chip card. This breaks down the code into the two prime numbers and calculates using the formula
  • Y X to the power 3 mod N the data for the motor electronics from a table in the memory of the chip card.
  • X is the data from the table
  • N is the product of the prime number
  • Y is the data that is then transmitted from the chip card to the security device. This then transmits the data to the engine electronics.
  • the code is preferably changed after each use of the chip card.
  • the random status of a constantly running counter (not shown) and as a pointer to a table is used for this.
  • the element that the pointer points to is the new code.
  • the counter runs " continuously (even after the ignition is switched off) at a speed of 100 steps per second. As a result, it is not possible for a user to provoke a specific result.
  • the embodiment shown in FIG. 2 is a further development of the invention.
  • the safety device is connected to the cable to be connected to the on-board computer.
  • the safety device device integrated with the connector to be connected to the motor electronics in one unit, for example by gluing or casting.
  • the on-board computer itself is unchanged.
  • the safety device 30 By arranging the safety device 30 in the signal path between the on-board computer and peripheral units, some of the lines can be cut and connected to the safety device. Operational signals for the engine electronics and signals from the engine electronics to individual components are blocked or changed by the electronics of the safety device.
  • the signal transmitter A and signal transmitter B 50 1 and 50 2 serve, for example, the brand transmitter for top dead center, the angle transmitter for determining the working position of the engine or the control "ignition on" from the ignition key.
  • the ignition amplifier 60 1 for emitting ignition pulses, the injector 60 2 for emitting injection pulses or other components 60 n , such as the gasoline pump and the throttle valve, can be used as actuating devices.
  • operationally relevant signals for the engine electronics and signals from the engine electronics to individual components, such as the injection valve, can be blocked or changed by the electronics on the safety device.
  • the security device is connected to the reading and writing device for a microprocessor chip card. By inserting a valid card, the original signals are then routed into or out of the motor electronics.
  • control signals can be interrupted or changed for the external control device.
  • Measurement signals from detectors are supplied in digital and analog form as input variables.
  • the signals "top dead center” and “position of the crankshaft” are digital values.
  • Motronik counts the impulses of the crankshaft position from the impulse top dead center and thus determines the actual position of the crankshaft / camshaft and the speed.
  • the sensor for the crankshaft position is usually just an encoder that reproduces the teeth on the starter ring gear on the crankshaft in the form of rectangular pulses, i.e. there is no angle indication, the Motronik calculates these from the two values dead center and number of teeth from dead center.
  • sensors that measure the amount of air sucked in (always indirectly via dynamic pressure, suction pipe vacuum or speed of the air sucked in). These are analog values, usually variable resistances which are measured in voltage (0 to 7V, impressed current) or current (a few mA, impressed voltage).
  • the throttle valve position is partly supplied as a digital value (idle position, full throttle position) and as a variable angle value, i.e. a resistance of a few kOhm depending on the throttle position 0-90 degrees.
  • the triple speed, intake air quantity and throttle valve position mainly determine the metered injection quantity per cylinder and the ignition timing.
  • the air temperature, the air pressure, the engine temperature and some other influencing variables are measured. However, only a small percentage of these are included in the calculation. An interruption or change of these signals affects the vehicle's readiness to drive.
  • Essentially digital control signals with a variable pulse width are output. These control the opening times of the petrol injection nozzles and ignition timing Point. Valve control is also influenced in luxury vehicles.
  • the blocking and changing of signals should preferably be on the input side.
  • the control pulses for the injection nozzles are of low impedance with a high inductive component (coils) and require very complex circuits. Only the control signals for the ignition are passed on to an amplifier, which generates the actual high voltage.
  • the input signals can be easily blocked or influenced using conventional electronic means.
  • the variables top dead center, crankshaft position, air quantity, throttle valve position and ignition pulses are therefore preferably influenced by the invention.
  • the digital signals are blocked by an electronic switch (CMOS transistor), or the digital signal goes to an electronic gate and is e.g. AND linked.
  • CMOS transistor complementary metal-oxide-semiconductor
  • the analog signals are blocked by an analog semiconductor switch (the signals are unipolar, so that standard ICs are sufficient).
  • a further form of the invention is a change in the signals which are sent to the motronics or passed on by them.
  • the pulses from the top dead center sensor can be delayed by a certain time (switchable delay line), the pulses from the crankshaft position are divided by a digital counter by 2,4,8, leaving the same apply to the output pulses for the ignition amplifier.
  • a permanent idle position of the throttle valve is signaled by connecting an open collector gate to the relevant signal line.
  • the analog signals are generated by means of a D / A converter and supplied to the Motronik instead of the original data and thus signal a e.g. very small amount of air sucked in.
  • a reader for fingerprints can be provided. By hanging up a fin The reader then releases the motor electronics. Furthermore, it is possible to use the chip card as a tachograph, with corresponding data being supplied to the chip card during operation of the vehicle and being stored in the first data memory for later analysis or diagnosis.

Abstract

Un dispositif empêchant l'utilisation illicite d'un véhicule à moteur comprend un système d'entraînement commandé par un ordinateur de bord (40). Le dispositif comprend une carte à puce (10) avec un microprocesseur (12) et un dispositif de lecture et d'écriture de la carte (20) connecté à l'ordinateur de bord. Le microprocesseur traite les informations provenant du dispositif de lecture et d'écriture de la carte, les transforme en données d'exploitation qui permettent de faire démarrer le véhicule à moteur et les transmet à l'ordinateur de bord par l'intermédiaire du dispositif de lecture et d'écriture de la carte, afin de permettre au véhicule de démarrer. L'avantage du dispositif est qu'il assure une protection accrue du véhicule contre le vol.
EP94916218A 1993-05-07 1994-05-09 Dispositif electronique anti-vol pour vehicules a moteur Withdrawn EP0648168A1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE4315290 1993-05-07
DE19934315290 DE4315290C2 (de) 1993-05-07 1993-05-07 Verfahren zum Schutz gegen das unbefugte Benutzen eines Kraftfahrzeuges
DE19934333586 DE4333586A1 (de) 1993-10-01 1993-10-01 Elektronische Diebstahlsicherung für Kraftfahrzeuge
DE4333586 1993-10-01
PCT/EP1994/001480 WO1994026564A1 (fr) 1993-05-07 1994-05-09 Dispositif electronique anti-vol pour vehicules a moteur

Publications (1)

Publication Number Publication Date
EP0648168A1 true EP0648168A1 (fr) 1995-04-19

Family

ID=25925710

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94916218A Withdrawn EP0648168A1 (fr) 1993-05-07 1994-05-09 Dispositif electronique anti-vol pour vehicules a moteur

Country Status (2)

Country Link
EP (1) EP0648168A1 (fr)
WO (1) WO1994026564A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0654383B1 (fr) * 1993-11-22 2003-10-01 Honda Giken Kogyo Kabushiki Kaisha Contrôleur pour un véhicule
EP0790161A3 (fr) * 1996-02-19 1999-05-26 Volkswagen Aktiengesellschaft Dispositif et méthode antivol pour véhicules
DE10330980A1 (de) * 2003-07-09 2005-01-27 Giesecke & Devrient Gmbh System zur Motorsteuerung

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2051442B (en) * 1979-03-30 1984-02-01 Howard J A Security system
EP0075059A1 (fr) * 1981-09-22 1983-03-30 Arrigo Minelli Dispositif électromécanique antivol pour autovéhicules
FR2526977B1 (fr) * 1982-05-14 1988-06-10 Cii Honeywell Bull Procede et dispositif pour authentifier ou certifier au moins une information contenue dans une memoire d'un support electronique notamment amovible et portatif tel qu'une carte
FR2592510B1 (fr) * 1985-12-31 1988-02-12 Bull Cp8 Procede et appareil pour certifier des services obtenus a l'aide d'un support portatif tel qu'une carte a memoire
DE3836026A1 (de) * 1988-10-22 1990-04-26 Zimmer Hans J Zentralverriegelung fuer eine mehrzahl von einheiten und/oder teilen einer gesamtanlage, insbesondere diebstahlsicherung fuer kraftfahrzeuge
DE3844377A1 (de) * 1988-12-30 1990-07-05 Griesemer Albert Zuendanlage fuer kraftfahrzeuge
EP0437101A1 (fr) * 1990-01-08 1991-07-17 Edward C. Posner Dispositif antivol pour automobile
ES2024250A6 (es) * 1990-05-11 1992-02-16 Telettra Espa Sistema de proteccion integral para vehiculos.
FR2666059A1 (fr) * 1990-08-21 1992-02-28 Adesco Systeme de protection de vehicule.
GB2252847B (en) * 1991-02-18 1994-10-12 Gec Avery Ltd Engine management system
DE69216644T2 (de) * 1991-09-17 1997-04-24 Ford Werke Ag Kraftfahrzeugsicherheitsystem

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9426564A1 *

Also Published As

Publication number Publication date
WO1994026564A1 (fr) 1994-11-24

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